Dynamo-electric machine.



G. WINTER & I'. EICHBBRG. o. woLrnUu, Dunusmnpn ,ora-WINTER, DBG'D.

DYNAMO ELECTRIC MACHINE. ArLIoATIoN FILED JAN.9,1912,

l,073,31 1. Patentd Sept. 16, 1913.

www. wem'onr.

srarns PATENT OFFICE.

lGABRIEL WINTER, mE-onaslsn, :er erro WoLrnUI/I, ADMINISTRATOR, or VIENNA, AUSTRIA-HUNGARY, AND FRIEDRICH EICIIBERG, or BERLIN, GERMANY;SAID WINTER 'AND SAID nicnas-no AssroNons To GENERAL ELECTRIC COMPANY, A.

CORPORATION OF NEW YORK. v

nYNaMo-ELECTBIC MACHINE.

Specification of Letters Patent.

Patented Sept. 16, 1913.

original application and nine 11,- 1962, seal No. 111,180. Divided and applica/emi mea August a, 1906, Serial No. 329,022. Divided and this application. filed January 9, 1912. Serial No. 670,162.

To all whom it may concern,

Beft known that We, O'I'ro WOLFRUM, residing at Vienna, Austri`a-Hungary, administrator of the estate of GABRIEL WINrnn, deceased, Whose vcertificate-o1 authority 1s recorded at page L138 ot Liber S 00 ot Transfers of Patents, and 'FninonIon Eicinsnn'e,

asubject of the Emperor of AnstriaHungary, residing at Berlin, in the Empire of Germany, severally decl-are that the late GABRIEL VINTER and the said FRIEDRICH EIGHBERG have inventedcer'tain new and useful Improvementsv in Dynamo-Electric Machines, of which the following is a specification.

This applicationis a division of a former' application filed by the said Gabriel Winter and Friedrich Eichberg, on August 3rd,

f 1906, Ser. No. 329022, (Patent No. 1,016,865

of February 6,1912) Which is in turn a division of an earlier application filed by .them on June 11. 1902, Ser. No. 111,180,

. (PatentNo.1,616,866,0freb. 6,1912.) 'In trical degrees from .the other brushes. More l Winding is connected in series with the rotor` those former applications there are described, alternating current machines of the commutator type in which the tivo members of the motor are provided with primary and secondary windings, respectively, arranged to produce 'a single magnetization alonga fixed line constituting the Working axis, and there is added to the primary and secondary windings a vthird Winding so arranged that the current in it produces 'a magnetic field having an axis which makes an angle with andy is lpreferably at right angles to the' said Working axis. As described in the4 said former application, Ser. No. 329,022, this third, or exciting Winding is placed upon the rotor, either as an independent Winding 'or in combination with the secondary Wind- Ing, and current 1s supplied to 1t through a second system of brushes displaced 90 elec#v specifically there is described in that -appli'cation and illustrated in Figure 5 thereof, a motor of this type in which the exciting working Winding, so that the current is in phase with the working current. The p1es entvapplicationr relates specifically to this last modification.

The invention will best he understood by reference to the accompanving diagram-'- matic drawing", which is identical with Fig. 5, ofthe former applicatiomrSer. No. 329,022

l and with Fig. 10 of the former application,

Ser. No. 111,180.

Let the primary and secondary7 Winding systems (hereinafter called P and S) of an alternating current transformer be arranged inthe manner illustrated in this diagrammatic drawing, z'. e., as separate bipolar ring windings disposed in such a Way that Sloan move independently of P, While the magnetic poles of S are maintained on the line ac. (constituting the working axis), which can be easily lattainedby providing the winding S with a segmental commuta--.

tor provided with brushes situated on the line o.' :zz. It .now 'there bev added to the Vwindings P and S a Winding M so arranged that the current in it produces a magnetic field having the axis y y substantially 90 electricaly degreesrdisplaced from'the axis oft-he field ofthe windings l? and S, and if the current supplied to the winding M corresponds las nearly as .possible in'phase to the currents in-P- and S; then a torque is' produced which is'proportional to the field "of Winding M, to the-ampere turns of the rotor S and to the cosine of' the angle of displacement of phase between these last magnitudes. Upon rotation ot the rotor in the field havingan axis y y, z'. e., the eld of Winding M,.there is generated a counter electroniotive force which has its greatest effective value onvv the line fc and is in Iphase with the magnetic field having the axis y y, since it is generated by rotation in that field. vIt the phase angle 4between the electromotive force connected to S (this electroniotive force 'being hereinafter re- `ierred to as E2) and the magnetic field of.v

M is very small, and the influence of the magnetic leakageand ohmic-loss is disregarded, then the eounter-'electromotive force due to the rotatiom which is in phase with the magnetic eld of M, is consequently nearly, in phase with, z'. e., in the saine orA opposite, direction to, the electromotive force con` nected to the roter, and also with the electromotive force generated in the rotor by.

the primary field on the axis m vsince this latter electromotive torce is substantially 1n phase With the electromotivel force impressed on the secondary..

ln the arrangement shown in the drawing the winding P placed on the motor and is subjected to the full potential lll. rhe winding S is placed on the rotor and is connected at intervals to many-part connnutator in which the brushes B B2 bear on the line a". ,"and the winding M is also place-d on the rotor and is provided with a commutator distinct trom the con'nnutator to which the winding S is connectcd,'this coininul'ator being provided with "the brushes llt arranged on the line g/ g/ and connected in series with the brushes ot the working rotor windingv ln this way the field is excited by current coming 'trom the brushes, and a field winding system of few turns can be used in order to permit the use ot a low Voltage atl Athe conuuutator, instead oi" system of many turns such as would be suitable when the iield lill is excited t'roin an external source of comparatively high volt-age. lilith this arrangement., {Furthermore, the lield M must obviously be always in phase with -the rotor current,

ln the arrangement described it is evident that the field produced on the line a' by the currents inwiudings l and S, which is the field that produces the counter-electrometiVe torce in winding P and the secondary induced electrornotive :torce in winding 900 out of phase with the voltage impressed on winding l). The 'ield produced on thel line 3/ y, however, is approximately in phase with the currents in windings P and S, since winding M is connected in series with windino; S. The two fields tend to produce a Y rotary lield which is more or less uniform,

according as the two component fields vary in relative strength and the phase ot' the currents in windings l? and El varies relatively to the voltage impressed on winding P; and this rotary held is produced without the necessity or' providing external sources of volt-ages ot dilicreut phases for the currents supplied to the winding l and to the winding lvl respectively,

Machines constructed in accordance with the invention can be used as generators, loe-` cause upon excitation through the magnetic field of any given strength an electromotiye force must in all cases arise at the rotating armature, and this elcctromotiye torce, quite independently of the number of revolutions of the rotor, is equal -in phase and periodicity with thev niagneti field.

lThe figure illustrates a bipolar arrange ment merely by wayy of example. For an apparatus haring a greater number of poles the"magnetic ai m and y y are, generally stated, inclined to Aone another at an anglenot 900 divided by hall' the number oit poles, or 5)() electrical :degrees The windings on. the 'stator are herein shown as ring `\Jindings, hutit must be understood that all known and suitable open or closed windings can be used. The wind- .ings on the roto-r are shown also as ring windings but all suitable closed windings such as are used for continuous currents and with segmental conimutators can be used.`

lWhat we'claim is:

1. An alternating current machine of the coinrnutator type having a rotor,.,a stator entirely surrounding the rotor and separated therefrom by a substantially uniform air gap, brushes and connections therefor cooperating with the rotor windings to form a path 'for the'working currents along approximately the line of the primary field, and connections 'for supplying to the rotor a Nef-:citing current at an angle to the line ot the primary field and in series with and consequently in phase with the working currents.

21. An alternating current machine ot the commutator type having a rotor, a stator surrounding the rotor and separated therefrom hy a substantially yuniform air gap, brushes and connections therefor coperating with the rotor windings to form a path for the working currents 'along approximately the line of the primary field, separate brushes at an angle to the first, and connections for feeding to the separate brushes an exciting current in series with and consequently in phase with the working currents.

An alternating current machine or the commutator type having a rotor, a stator entirely surrounding the rotor and separated therefrom by a substantially uniform` air gap, brushes and connections therefor coperating with; the rotor windings to torni a path for the working currents along approximately the line of the primary field, separate brushes displaced substantially ninety electrical degrees from the first set of' brushes, and connections for feeding to the separate brushes an exciting current in series with and consequently in phase with the working current-s.

ln testimony whereof we a'tlix our signatures in the presence of two witnesses.

DTT() lllOliFltUM. Administrator of the estate 0] Gabriel Winter, deceased.

FRlEDRlGll EICHBRG. Witnesses to the signature ot Otto lllolfrum:

AUGUST Friesen, ADA, MARIA Benson. TWitnesses to the signature of Friedrich lflichberg Iwan DRY, LEOPOLD JANrsoiL 

